1 /*****************************************************************************\
3 ** Linux Call Router **
5 **---------------------------------------------------------------------------**
6 ** Copyright: Andreas Eversberg **
8 ** Asterisk socket client **
10 \*****************************************************************************/
16 To connect, open an LCR socket and send a MESSAGE_HELLO to socket with
17 the application name. This name is unique an can be used for routing calls.
18 Now the channel driver is linked to LCR and can receive and make calls.
21 Call is initiated by LCR:
23 If a call is received from LCR, a MESSAGE_NEWREF is received first.
24 The ref_was_assigned ist set to 1.
25 A new chan_call instance is created. The call reference (ref) is given by
26 the received MESSAGE_NEWREF. The state is CHAN_LCR_STATE_IN_PREPARE.
27 After receiving MESSAGE_SETUP from LCR, the ast_channel instance is created
28 using ast_channel_alloc(1). The setup information is given to asterisk.
29 The new Asterisk instance pointer (ast) is stored to chan_call structure.
30 The state changes to CHAN_LCR_STATE_IN_SETUP.
33 Call is initiated by Asterisk:
35 If a call is requested from Asterisk, a new chan_call instance is created.
36 The new Asterisk instance pointer (ast) is stored to chan_call structure.
37 The current call ref is set to 0, the state is CHAN_LCR_STATE_OUT_PREPARE.
38 If the call is received (lcr_call) A MESSAGE_NEWREF is sent to LCR requesting
39 a new call reference (ref).
40 The ref_was_assigned ist set to 1.
41 Further dialing information is queued.
42 After the new callref is received by special MESSAGE_NEWREF reply, new ref
43 is stored in the chan_call structure.
44 The setup information is sent to LCR using MESSAGE_SETUP.
45 The state changes to CHAN_LCR_STATE_OUT_SETUP.
50 During call process, messages are received and sent.
51 The state changes accordingly.
52 Any message is allowed to be sent to LCR at any time except MESSAGE_RELEASE.
53 If a MESSAGE_OVERLAP is received, further dialing is required.
54 Queued dialing information, if any, is sent to LCR using MESSAGE_DIALING.
55 In this case, the state changes to CHAN_LCR_STATE_OUT_DIALING.
58 Call is released by LCR:
60 A MESSAGE_RELEASE is received with the call reference (ref) to be released.
61 The current ref is set to 0, to indicate released reference.
62 The ref_was_assigned==1 shows that there is no other ref to be assigned.
63 The state changes to CHAN_LCR_STATE_RELEASE.
64 ast_queue_hangup() is called, if asterisk instance (ast) exists, if not,
65 the chan_call instance is destroyed.
66 After lcr_hangup() is called-back by Asterisk, the chan_call instance
67 is destroyed, because the current ref is set to 0 and the state equals
68 CHAN_LCR_STATE_RELEASE.
69 If the ref is 0 and the state is not CHAN_LCR_STATE_RELEASE, see the proceedure
70 "Call is released by Asterisk".
73 Call is released by Asterisk:
75 lcr_hangup() is called-back by Asterisk. If the call reference (ref) is set,
76 a MESSAGE_RELEASE is sent to LCR and the chan_call instance is destroyed.
77 If the ref is 0 and the state is not CHAN_LCR_STATE_RELEASE, the new state is
78 set to CHAN_LCR_STATE_RELEASE.
79 The ref_was_assigned==0 shows that a ref is still requested.
80 Later, if the MESSAGE_NEWREF reply is received, a MESSAGE_RELEASE is sent to
81 LCR and the chan_call instance is destroyed.
82 If the ref is 0 and the state is CHAN_LCR_STATE_RELEASE, see the proceedure
83 "Call is released by LCR".
88 The deadlocking problem:
90 - chan_lcr locks chan_lock and waits inside ast_queue_xxxx() for ast_channel
92 - ast_channel thread locks ast_channel and calls a tech function and waits
93 there for chan_lock to be unlocked.
97 Never call ast_queue_xxxx() if ast_channel is not locked and don't wait until
98 ast_channel can be locked. All messages to asterisk are queued inside call
99 instance and will be handled using a try-lock to get ast_channel lock.
100 If it succeeds to lock ast_channel, the ast_queue_xxxx can safely called even
101 if the lock is incremented and decremented there.
103 Exception: Calling ast_queue_frame inside ast->tech->read is safe, because
104 it is called from ast_channel process which has already locked ast_channel.
113 #include <sys/types.h>
115 //#include <signal.h>
118 #include <sys/ioctl.h>
119 #include <sys/socket.h>
122 #include <semaphore.h>
124 #include <asterisk/module.h>
125 #include <asterisk/channel.h>
126 #include <asterisk/config.h>
127 #include <asterisk/logger.h>
128 #include <asterisk/pbx.h>
129 #include <asterisk/options.h>
130 #include <asterisk/io.h>
131 #include <asterisk/frame.h>
132 #include <asterisk/translate.h>
133 #include <asterisk/cli.h>
134 #include <asterisk/musiconhold.h>
135 #include <asterisk/dsp.h>
136 #include <asterisk/translate.h>
137 #include <asterisk/file.h>
138 #include <asterisk/callerid.h>
139 #include <asterisk/indications.h>
140 #include <asterisk/app.h>
141 #include <asterisk/features.h>
142 #include <asterisk/sched.h>
144 #include "extension.h"
146 #include "callerid.h"
147 #include "lcrsocket.h"
149 #include "bchannel.h"
151 #include "chan_lcr.h"
153 CHAN_LCR_STATE // state description structure
154 MESSAGES // message text
156 unsigned char flip_bits[256];
161 char lcr_type[]="lcr";
164 ast_mutex_t chan_lock; /* global lock */
165 ast_mutex_t log_lock; /* logging log */
168 int glob_channel = 0;
173 struct admin_list *next;
174 struct admin_message msg;
175 } *admin_first = NULL;
177 static struct ast_channel_tech lcr_tech;
182 void chan_lcr_log(int type, const char *file, int line, const char *function, struct chan_call *call, struct ast_channel *ast, const char *fmt, ...)
185 char call_text[128] = "NULL";
186 char ast_text[128] = "NULL";
189 ast_mutex_lock(&log_lock);
192 vsnprintf(buffer,sizeof(buffer)-1,fmt,args);
193 buffer[sizeof(buffer)-1]=0;
197 sprintf(call_text, "%d", call->ref);
199 strncpy(ast_text, ast->name, sizeof(ast_text)-1);
200 ast_text[sizeof(ast_text)-1] = '\0';
202 ast_log(type, file, line, function, "[call=%s ast=%s] %s", call_text, ast_text, buffer);
204 ast_mutex_unlock(&log_lock);
208 * channel and call instances
210 struct chan_call *call_first;
214 * special case: 0: find new ref, that has not been assigned a ref yet
217 struct chan_call *find_call_ref(unsigned int ref)
219 struct chan_call *call = call_first;
220 int assigned = (ref > 0);
224 if (call->ref == ref && call->ref_was_assigned == assigned)
231 void free_call(struct chan_call *call)
233 struct chan_call **temp = &call_first;
239 *temp = (*temp)->next;
240 if (call->pipe[0] > -1)
241 close(call->pipe[0]);
242 if (call->pipe[1] > -1)
243 close(call->pipe[1]);
246 if (call->bchannel->call != call)
247 CERROR(call, NULL, "Linked bchannel structure has no link to us.\n");
248 call->bchannel->call = NULL;
250 if (call->bridge_call)
252 if (call->bridge_call->bridge_call != call)
253 CERROR(call, NULL, "Linked call structure has no link to us.\n");
254 call->bridge_call->bridge_call = NULL;
256 CDEBUG(call, NULL, "Call instance freed.\n");
260 temp = &((*temp)->next);
262 CERROR(call, NULL, "Call instance not found in list.\n");
265 struct chan_call *alloc_call(void)
267 struct chan_call **callp = &call_first;
270 callp = &((*callp)->next);
272 *callp = (struct chan_call *)calloc(1, sizeof(struct chan_call));
274 memset(*callp, 0, sizeof(struct chan_call));
275 if (pipe((*callp)->pipe) < 0) {
276 CERROR(*callp, NULL, "Failed to create pipe.\n");
280 fcntl((*callp)->pipe[0], F_SETFL, O_NONBLOCK);
281 CDEBUG(*callp, NULL, "Call instance allocated.\n");
285 unsigned short new_bridge_id(void)
287 struct chan_call *call;
288 unsigned short id = 1;
290 /* search for lowest bridge id that is not in use and not 0 */
296 if (call->bridge_id == id)
304 CDEBUG(NULL, NULL, "New bridge ID %d.\n", id);
309 * enque message to LCR
311 int send_message(int message_type, unsigned int ref, union parameter *param)
313 struct admin_list *admin, **adminp;
316 CDEBUG(NULL, NULL, "Ignoring message %d, because socket is closed.\n", message_type);
319 CDEBUG(NULL, NULL, "Sending %s to socket.\n", messages_txt[message_type]);
321 adminp = &admin_first;
323 adminp = &((*adminp)->next);
324 admin = (struct admin_list *)calloc(1, sizeof(struct admin_list));
326 CERROR(NULL, NULL, "No memory for message to LCR.\n");
331 admin->msg.message = ADMIN_MESSAGE;
332 admin->msg.u.msg.type = message_type;
333 admin->msg.u.msg.ref = ref;
334 memcpy(&admin->msg.u.msg.param, param, sizeof(union parameter));
340 * apply options (in locked state)
342 void apply_opt(struct chan_call *call, char *data)
344 union parameter newparam;
345 char string[1024], *p = string, *opt, *key;
346 int gain, i, newmode = 0;
351 strncpy(string, data, sizeof(string)-1);
352 string[sizeof(string)-1] = '\0';
355 while((opt = strsep(&p, ":")))
359 if (opt[1] == '\0') {
360 CERROR(call, call->ast, "Option 'd' (display) expects parameter.\n", opt);
363 CDEBUG(call, call->ast, "Option 'd' (display) with text '%s'.\n", opt+1);
364 if (call->state == CHAN_LCR_STATE_OUT_PREPARE)
365 strncpy(call->display, opt+1, sizeof(call->display)-1);
367 memset(&newparam, 0, sizeof(union parameter));
368 strncpy(newparam.notifyinfo.display, opt+1, sizeof(newparam.notifyinfo.display)-1);
369 send_message(MESSAGE_NOTIFY, call->ref, &newparam);
373 if (opt[1] != '\0') {
374 CERROR(call, call->ast, "Option 'n' (no DTMF) expects no parameter.\n", opt);
377 CDEBUG(call, call->ast, "Option 'n' (no DTMF).\n");
381 if (opt[1] == '\0') {
382 CERROR(call, call->ast, "Option 'c' (encrypt) expects key parameter.\n", opt);
386 /* check for 0xXXXX... type of key */
387 if (!!strncmp((char *)key, "0x", 2)) {
388 CERROR(call, call->ast, "Option 'c' (encrypt) expects key parameter starting with '0x'.\n", opt);
392 if (strlen(key) > 56*2 || (strlen(key) % 1)) {
393 CERROR(call, call->ast, "Option 'c' (encrypt) expects key parameter with max 56 bytes ('0x' + 112 characters)\n", opt);
399 if (*key>='0' && *key<='9')
400 call->bf_key[i] = (*key-'0') << 8;
401 else if (*key>='a' && *key<='f')
402 call->bf_key[i] = (*key-'a'+10) << 8;
403 else if (*key>='A' && *key<='F')
404 call->bf_key[i] = (*key-'A'+10) << 8;
408 if (*key>='0' && *key<='9')
409 call->bf_key[i] += (*key - '0');
410 else if (*key>='a' && *key<='f')
411 call->bf_key[i] += (*key - 'a' + 10);
412 else if (*key>='A' && *key<='F')
413 call->bf_key[i] += (*key - 'A' + 10);
420 CERROR(call, call->ast, "Option 'c' (encrypt) expects key parameter with hex values 0-9,a-f.\n");
424 CDEBUG(call, call->ast, "Option 'c' (encrypt) blowfish key '%s' (len=%d).\n", opt+1, i);
426 bchannel_blowfish(call->bchannel, call->bf_key, call->bf_len);
429 if (opt[1] != '\0') {
430 CERROR(call, call->ast, "Option 'h' (HDLC) expects no parameter.\n", opt);
433 CDEBUG(call, call->ast, "Option 'h' (HDLC).\n");
440 if (opt[1] != '\0') {
441 CERROR(call, call->ast, "Option 't' (no_dsp) expects no parameter.\n", opt);
444 CDEBUG(call, call->ast, "Option 't' (no dsp).\n");
451 if (opt[1] == '\0') {
452 CERROR(call, call->ast, "Option 'e' (echo cancel) expects parameter.\n", opt);
455 CDEBUG(call, call->ast, "Option 'e' (echo cancel) with config '%s'.\n", opt+1);
456 strncpy(call->pipeline, opt+1, sizeof(call->pipeline)-1);
458 bchannel_pipeline(call->bchannel, call->pipeline);
461 if (opt[1] != '\0') {
462 CERROR(call, call->ast, "Option 'r' (re-buffer 160 bytes) expects no parameter.\n", opt);
465 CDEBUG(call, call->ast, "Option 'r' (re-buffer 160 bytes)");
470 if (opt[1] != '\0') {
471 CERROR(call, call->ast, "Option 's' (inband DTMF) expects no parameter.\n", opt);
474 CDEBUG(call, call->ast, "Option 's' (inband DTMF).\n");
475 call->inband_dtmf = 1;
480 if (opt[1] != 'r' && opt[1] != 't') {
481 CERROR(call, call->ast, "Option 'v' (volume) expects parameter.\n", opt);
485 if (gain < -8 || gain >8) {
486 CERROR(call, call->ast, "Option 'v' (volume) expects parameter in range of -8 through 8.\n");
489 CDEBUG(call, call->ast, "Option 'v' (volume) with gain 2^%d.\n", gain);
491 call->rx_gain = gain;
493 bchannel_gain(call->bchannel, call->rx_gain, 0);
495 call->tx_gain = gain;
497 bchannel_gain(call->bchannel, call->tx_gain, 1);
501 CERROR(call, call->ast, "Option '%s' unknown.\n", opt);
505 /* re-open, if bchannel is created */
506 if (call->bchannel && call->bchannel->b_sock > -1) {
507 bchannel_destroy(call->bchannel);
508 if (bchannel_create(call->bchannel, ((call->nodsp)?1:0) + ((call->hdlc)?2:0)))
509 bchannel_activate(call->bchannel, 1);
514 * send setup info to LCR
515 * this function is called, when asterisk call is received and ref is received
517 static void send_setup_to_lcr(struct chan_call *call)
519 union parameter newparam;
520 struct ast_channel *ast = call->ast;
522 if (!call->ast || !call->ref)
525 CDEBUG(call, call->ast, "Sending setup to LCR. (interface=%s dialstring=%s, cid=%s)\n", call->interface, call->dialstring, call->cid_num);
527 /* send setup message to LCR */
528 memset(&newparam, 0, sizeof(union parameter));
529 newparam.setup.dialinginfo.itype = INFO_ITYPE_ISDN;
530 newparam.setup.dialinginfo.ntype = INFO_NTYPE_UNKNOWN;
531 strncpy(newparam.setup.dialinginfo.id, call->dialstring, sizeof(newparam.setup.dialinginfo.id)-1);
532 strncpy(newparam.setup.dialinginfo.interfaces, call->interface, sizeof(newparam.setup.dialinginfo.interfaces)-1);
533 newparam.setup.callerinfo.itype = INFO_ITYPE_CHAN;
534 newparam.setup.callerinfo.ntype = INFO_NTYPE_UNKNOWN;
535 strncpy(newparam.setup.callerinfo.display, call->display, sizeof(newparam.setup.callerinfo.display)-1);
536 call->display[0] = '\0';
537 if (call->cid_num[0])
538 strncpy(newparam.setup.callerinfo.id, call->cid_num, sizeof(newparam.setup.callerinfo.id)-1);
539 if (call->cid_name[0])
540 strncpy(newparam.setup.callerinfo.name, call->cid_name, sizeof(newparam.setup.callerinfo.name)-1);
541 if (call->cid_rdnis[0])
543 strncpy(newparam.setup.redirinfo.id, call->cid_rdnis, sizeof(newparam.setup.redirinfo.id)-1);
544 newparam.setup.redirinfo.itype = INFO_ITYPE_CHAN;
545 newparam.setup.redirinfo.ntype = INFO_NTYPE_UNKNOWN;
547 switch(ast->cid.cid_pres & AST_PRES_RESTRICTION)
549 case AST_PRES_ALLOWED:
550 newparam.setup.callerinfo.present = INFO_PRESENT_ALLOWED;
552 case AST_PRES_RESTRICTED:
553 newparam.setup.callerinfo.present = INFO_PRESENT_RESTRICTED;
555 case AST_PRES_UNAVAILABLE:
556 newparam.setup.callerinfo.present = INFO_PRESENT_NOTAVAIL;
559 newparam.setup.callerinfo.present = INFO_PRESENT_NULL;
561 switch(ast->cid.cid_ton)
564 newparam.setup.callerinfo.ntype = INFO_NTYPE_SUBSCRIBER;
567 newparam.setup.callerinfo.ntype = INFO_NTYPE_NATIONAL;
570 newparam.setup.callerinfo.ntype = INFO_NTYPE_INTERNATIONAL;
573 newparam.setup.callerinfo.ntype = INFO_NTYPE_UNKNOWN;
575 newparam.setup.capainfo.bearer_capa = ast->transfercapability;
576 newparam.setup.capainfo.bearer_mode = INFO_BMODE_CIRCUIT;
578 newparam.setup.capainfo.source_mode = B_MODE_HDLC;
580 newparam.setup.capainfo.source_mode = B_MODE_TRANSPARENT;
581 newparam.setup.capainfo.bearer_info1 = (options.law=='a')?3:2;
583 newparam.setup.capainfo.hlc = INFO_HLC_NONE;
584 newparam.setup.capainfo.exthlc = INFO_HLC_NONE;
585 send_message(MESSAGE_SETUP, call->ref, &newparam);
587 /* change to outgoing setup state */
588 call->state = CHAN_LCR_STATE_OUT_SETUP;
592 * send dialing info to LCR
593 * this function is called, when setup acknowledge is received and dialing
596 static void send_dialque_to_lcr(struct chan_call *call)
598 union parameter newparam;
600 if (!call->ast || !call->ref || !call->dialque[0])
603 CDEBUG(call, call->ast, "Sending dial queue to LCR. (dialing=%s)\n", call->dialque);
605 /* send setup message to LCR */
606 memset(&newparam, 0, sizeof(union parameter));
607 strncpy(newparam.information.id, call->dialque, sizeof(newparam.information.id)-1);
608 call->dialque[0] = '\0';
609 send_message(MESSAGE_INFORMATION, call->ref, &newparam);
613 * in case of a bridge, the unsupported message can be forwarded directly
614 * to the remote call.
616 static void bridge_message_if_bridged(struct chan_call *call, int message_type, union parameter *param)
620 if (!call->bridge_call) return;
621 CDEBUG(call, NULL, "Sending message due briding.\n");
622 send_message(message_type, call->bridge_call->ref, param);
626 * send release message to LCR and import bchannel if exported
628 static void send_release_and_import(struct chan_call *call, int cause, int location)
630 union parameter newparam;
632 /* importing channel */
633 if (call->bchannel) {
634 memset(&newparam, 0, sizeof(union parameter));
635 newparam.bchannel.type = BCHANNEL_RELEASE;
636 newparam.bchannel.handle = call->bchannel->handle;
637 send_message(MESSAGE_BCHANNEL, call->ref, &newparam);
639 /* sending release */
640 memset(&newparam, 0, sizeof(union parameter));
641 newparam.disconnectinfo.cause = cause;
642 newparam.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
643 send_message(MESSAGE_RELEASE, call->ref, &newparam);
647 * check if extension matches and start asterisk
648 * if it can match, proceed
651 static void lcr_start_pbx(struct chan_call *call, struct ast_channel *ast, int complete)
654 union parameter newparam;
656 CDEBUG(call, ast, "Try to start pbx. (exten=%s context=%s complete=%s)\n", ast->exten, ast->context, complete?"yes":"no");
661 if (!ast_canmatch_extension(ast, ast->context, ast->exten, 1, call->oad))
663 CDEBUG(call, ast, "Got 'sending complete', but extension '%s' will not match at context '%s' - releasing.\n", ast->exten, ast->context);
667 if (!ast_exists_extension(ast, ast->context, ast->exten, 1, call->oad))
669 CDEBUG(call, ast, "Got 'sending complete', but extension '%s' would match at context '%s', if more digits would be dialed - releasing.\n", ast->exten, ast->context);
673 CDEBUG(call, ast, "Got 'sending complete', extensions matches.\n");
674 /* send setup acknowledge to lcr */
675 memset(&newparam, 0, sizeof(union parameter));
676 send_message(MESSAGE_PROCEEDING, call->ref, &newparam);
679 call->state = CHAN_LCR_STATE_IN_PROCEEDING;
684 if (ast_canmatch_extension(ast, ast->context, ast->exten, 1, call->oad))
686 /* send setup acknowledge to lcr */
687 if (call->state != CHAN_LCR_STATE_IN_DIALING) {
688 memset(&newparam, 0, sizeof(union parameter));
689 send_message(MESSAGE_OVERLAP, call->ref, &newparam);
693 call->state = CHAN_LCR_STATE_IN_DIALING;
695 /* if match, start pbx */
696 if (ast_exists_extension(ast, ast->context, ast->exten, 1, call->oad)) {
697 CDEBUG(call, ast, "Extensions matches.\n");
702 CDEBUG(call, ast, "Extensions may match, if more digits are dialed.\n");
710 CDEBUG(call, ast, "Releasing due to extension missmatch.\n");
711 send_release_and_import(call, cause, LOCATION_PRIVATE_LOCAL);
713 /* release asterisk */
714 ast->hangupcause = call->cause;
715 /* change to release state */
716 call->state = CHAN_LCR_STATE_RELEASE;
717 ast_hangup(ast); // call will be destroyed here
721 /* send setup to asterisk */
722 CDEBUG(call, ast, "Starting call to Asterisk due to matching extension.\n");
723 ret = ast_pbx_start(ast);
726 cause = (ret==-2)?34:27;
729 call->pbx_started = 1;
730 // if (call->state == CHAN_LCR_STATE_IN_DIALING)
731 ast_setstate(ast, AST_STATE_RINGING);
733 // ast_setstate(ast, AST_STATE_RINGING);
738 * incoming setup from LCR
740 static void lcr_in_setup(struct chan_call *call, int message_type, union parameter *param)
742 struct ast_channel *ast;
744 CDEBUG(call, NULL, "Incomming setup from LCR. (callerid %s, dialing %s)\n", param->setup.callerinfo.id, param->setup.dialinginfo.id);
746 /* create asterisk channel instrance */
747 ast = ast_channel_alloc(1, AST_STATE_RESERVED, NULL, NULL, "", NULL, "", 0, "%s/%d", lcr_type, ++glob_channel);
751 CERROR(call, NULL, "Failed to create Asterisk channel - releasing.\n");
752 send_release_and_import(call, CAUSE_RESSOURCEUNAVAIL, LOCATION_PRIVATE_LOCAL);
759 ast->tech_pvt = call;
760 ast->tech = &lcr_tech;
761 ast->fds[0] = call->pipe[0];
763 /* fill setup information */
764 if (param->setup.dialinginfo.id)
765 strncpy(ast->exten, param->setup.dialinginfo.id, AST_MAX_EXTENSION-1);
766 if (param->setup.context[0])
767 strncpy(ast->context, param->setup.context, AST_MAX_CONTEXT-1);
769 strncpy(ast->context, param->setup.callerinfo.interface, AST_MAX_CONTEXT-1);
770 if (param->setup.callerinfo.id[0])
771 ast->cid.cid_num = strdup(param->setup.callerinfo.id);
772 if (param->setup.callerinfo.name[0])
773 ast->cid.cid_name = strdup(param->setup.callerinfo.name);
774 if (param->setup.redirinfo.id[0])
775 ast->cid.cid_name = strdup(numberrize_callerinfo(param->setup.callerinfo.id, param->setup.callerinfo.ntype, options.national, options.international));
776 switch (param->setup.callerinfo.present)
778 case INFO_PRESENT_ALLOWED:
779 ast->cid.cid_pres = AST_PRES_ALLOWED;
781 case INFO_PRESENT_RESTRICTED:
782 ast->cid.cid_pres = AST_PRES_RESTRICTED;
785 ast->cid.cid_pres = AST_PRES_UNAVAILABLE;
787 switch (param->setup.callerinfo.ntype)
789 case INFO_NTYPE_SUBSCRIBER:
790 ast->cid.cid_ton = 4;
792 case INFO_NTYPE_NATIONAL:
793 ast->cid.cid_ton = 2;
795 case INFO_NTYPE_INTERNATIONAL:
796 ast->cid.cid_ton = 1;
799 ast->cid.cid_ton = 0;
801 ast->transfercapability = param->setup.capainfo.bearer_capa;
802 /* enable hdlc if transcap is data */
803 if (param->setup.capainfo.source_mode == B_MODE_HDLC)
805 strncpy(call->oad, numberrize_callerinfo(param->setup.callerinfo.id, param->setup.callerinfo.ntype, options.national, options.international), sizeof(call->oad)-1);
807 /* configure channel */
808 ast->nativeformats = (options.law=='a')?AST_FORMAT_ALAW:AST_FORMAT_ULAW;
809 ast->readformat = ast->rawreadformat = ast->nativeformats;
810 ast->writeformat = ast->rawwriteformat = ast->nativeformats;
812 ast->hangupcause = 0;
815 call->state = CHAN_LCR_STATE_IN_SETUP;
817 if (!call->pbx_started)
818 lcr_start_pbx(call, ast, param->setup.dialinginfo.sending_complete);
822 * incoming setup acknowledge from LCR
824 static void lcr_in_overlap(struct chan_call *call, int message_type, union parameter *param)
826 if (!call->ast) return;
828 CDEBUG(call, call->ast, "Incomming setup acknowledge from LCR.\n");
830 /* send pending digits in dialque */
831 if (call->dialque[0])
832 send_dialque_to_lcr(call);
833 /* change to overlap state */
834 call->state = CHAN_LCR_STATE_OUT_DIALING;
838 * incoming proceeding from LCR
840 static void lcr_in_proceeding(struct chan_call *call, int message_type, union parameter *param)
842 CDEBUG(call, call->ast, "Incomming proceeding from LCR.\n");
845 call->state = CHAN_LCR_STATE_OUT_PROCEEDING;
846 /* queue event for asterisk */
847 if (call->ast && call->pbx_started)
848 strncat(call->queue_string, "P", sizeof(call->queue_string)-1);
852 * incoming alerting from LCR
854 static void lcr_in_alerting(struct chan_call *call, int message_type, union parameter *param)
856 CDEBUG(call, call->ast, "Incomming alerting from LCR.\n");
859 call->state = CHAN_LCR_STATE_OUT_ALERTING;
860 /* queue event to asterisk */
861 if (call->ast && call->pbx_started)
862 strncat(call->queue_string, "R", sizeof(call->queue_string)-1);
866 * incoming connect from LCR
868 static void lcr_in_connect(struct chan_call *call, int message_type, union parameter *param)
870 union parameter newparam;
872 CDEBUG(call, call->ast, "Incomming connect (answer) from LCR.\n");
875 call->state = CHAN_LCR_STATE_CONNECT;
876 /* request bchannel */
877 if (!call->bchannel) {
878 CDEBUG(call, call->ast, "Requesting B-channel.\n");
879 memset(&newparam, 0, sizeof(union parameter));
880 newparam.bchannel.type = BCHANNEL_REQUEST;
881 send_message(MESSAGE_BCHANNEL, call->ref, &newparam);
883 /* copy connectinfo */
884 memcpy(&call->connectinfo, ¶m->connectinfo, sizeof(struct connect_info));
885 /* queue event to asterisk */
886 if (call->ast && call->pbx_started)
887 strncat(call->queue_string, "A", sizeof(call->queue_string)-1);
891 * incoming disconnect from LCR
893 static void lcr_in_disconnect(struct chan_call *call, int message_type, union parameter *param)
895 struct ast_channel *ast = call->ast;
897 CDEBUG(call, call->ast, "Incomming disconnect from LCR. (cause=%d)\n", param->disconnectinfo.cause);
900 call->state = CHAN_LCR_STATE_IN_DISCONNECT;
902 call->cause = param->disconnectinfo.cause;
903 call->location = param->disconnectinfo.location;
904 /* if bridge, forward disconnect and return */
907 if (call->bridge_call)
909 CDEBUG(call, call->ast, "Only signal disconnect via bridge.\n");
910 bridge_message_if_bridged(call, message_type, param);
914 /* release lcr with same cause */
915 send_release_and_import(call, call->cause, call->location);
917 /* change to release state */
918 call->state = CHAN_LCR_STATE_RELEASE;
919 /* queue release asterisk */
922 ast->hangupcause = call->cause;
923 if (call->pbx_started)
924 strcpy(call->queue_string, "H"); // overwrite other indications
926 ast_hangup(ast); // call will be destroyed here
932 * incoming release from LCR
934 static void lcr_in_release(struct chan_call *call, int message_type, union parameter *param)
936 struct ast_channel *ast = call->ast;
938 CDEBUG(call, call->ast, "Incomming release from LCR, releasing ref. (cause=%d)\n", param->disconnectinfo.cause);
942 /* change to release state */
943 call->state = CHAN_LCR_STATE_RELEASE;
944 /* copy release info */
947 call->cause = param->disconnectinfo.cause;
948 call->location = param->disconnectinfo.location;
950 /* if we have an asterisk instance, queue hangup, else we are done */
953 ast->hangupcause = call->cause;
954 if (call->pbx_started)
955 strcpy(call->queue_string, "H");
957 ast_hangup(ast); // call will be destroyed here
967 * incoming information from LCR
969 static void lcr_in_information(struct chan_call *call, int message_type, union parameter *param)
971 struct ast_channel *ast = call->ast;
973 CDEBUG(call, call->ast, "Incoming information from LCR. (dialing=%s)\n", param->information.id);
977 /* pbx not started */
978 if (!call->pbx_started)
980 CDEBUG(call, call->ast, "Asterisk not started, adding digits to number.\n");
981 strncat(ast->exten, param->information.id, AST_MAX_EXTENSION-1);
982 lcr_start_pbx(call, ast, param->information.sending_complete);
986 /* change dailing state after setup */
987 if (call->state == CHAN_LCR_STATE_IN_SETUP) {
988 CDEBUG(call, call->ast, "Changing from SETUP to DIALING state.\n");
989 call->state = CHAN_LCR_STATE_IN_DIALING;
990 // ast_setstate(ast, AST_STATE_DIALING);
994 if (call->state == CHAN_LCR_STATE_IN_DIALING && param->information.id[0])
995 strncat(call->queue_string, param->information.id, sizeof(call->queue_string)-1);
997 /* use bridge to forware message not supported by asterisk */
998 if (call->state == CHAN_LCR_STATE_CONNECT) {
999 CDEBUG(call, call->ast, "Call is connected, briding.\n");
1000 bridge_message_if_bridged(call, message_type, param);
1005 * incoming information from LCR
1007 static void lcr_in_notify(struct chan_call *call, int message_type, union parameter *param)
1009 union parameter newparam;
1011 CDEBUG(call, call->ast, "Incomming notify from LCR. (notify=%d)\n", param->notifyinfo.notify);
1013 /* request bchannel, if call is resumed and we don't have it */
1014 if (param->notifyinfo.notify == INFO_NOTIFY_USER_RESUMED && !call->bchannel && call->ref) {
1015 CDEBUG(call, call->ast, "Reqesting bchannel at resume.\n");
1016 memset(&newparam, 0, sizeof(union parameter));
1017 newparam.bchannel.type = BCHANNEL_REQUEST;
1018 send_message(MESSAGE_BCHANNEL, call->ref, &newparam);
1021 if (!call->ast) return;
1023 /* use bridge to forware message not supported by asterisk */
1024 bridge_message_if_bridged(call, message_type, param);
1028 * incoming information from LCR
1030 static void lcr_in_facility(struct chan_call *call, int message_type, union parameter *param)
1032 CDEBUG(call, call->ast, "Incomming facility from LCR.\n");
1034 if (!call->ast) return;
1036 /* use bridge to forware message not supported by asterisk */
1037 bridge_message_if_bridged(call, message_type, param);
1041 * got dtmf from bchannel (locked state)
1043 void lcr_in_dtmf(struct chan_call *call, int val)
1045 struct ast_channel *ast = call->ast;
1050 if (!call->pbx_started)
1053 CDEBUG(call, call->ast, "Recognised DTMF digit '%c'.\n", val);
1056 strncat(call->queue_string, digit, sizeof(call->queue_string)-1);
1060 * message received from LCR
1062 int receive_message(int message_type, unsigned int ref, union parameter *param)
1064 struct bchannel *bchannel;
1065 struct chan_call *call;
1066 union parameter newparam;
1068 memset(&newparam, 0, sizeof(union parameter));
1070 /* handle bchannel message*/
1071 if (message_type == MESSAGE_BCHANNEL)
1073 switch(param->bchannel.type)
1075 case BCHANNEL_ASSIGN:
1076 CDEBUG(NULL, NULL, "Received BCHANNEL_ASSIGN message. (handle=%08lx) for ref %d\n", param->bchannel.handle, ref);
1077 if ((bchannel = find_bchannel_handle(param->bchannel.handle)))
1079 CERROR(NULL, NULL, "bchannel handle %x already assigned.\n", (int)param->bchannel.handle);
1082 /* create bchannel */
1083 bchannel = alloc_bchannel(param->bchannel.handle);
1086 CERROR(NULL, NULL, "alloc bchannel handle %x failed.\n", (int)param->bchannel.handle);
1090 /* configure channel */
1091 bchannel->b_tx_gain = param->bchannel.tx_gain;
1092 bchannel->b_rx_gain = param->bchannel.rx_gain;
1093 strncpy(bchannel->b_pipeline, param->bchannel.pipeline, sizeof(bchannel->b_pipeline)-1);
1094 if (param->bchannel.crypt_len && param->bchannel.crypt_len <= sizeof(bchannel->b_bf_key))
1096 bchannel->b_bf_len = param->bchannel.crypt_len;
1097 memcpy(bchannel->b_bf_key, param->bchannel.crypt, param->bchannel.crypt_len);
1099 bchannel->b_txdata = 0;
1100 bchannel->b_dtmf = 1;
1101 bchannel->b_tx_dejitter = 1;
1103 /* in case, ref is not set, this bchannel instance must
1104 * be created until it is removed again by LCR */
1106 call = find_call_ref(ref);
1109 bchannel->call = call;
1110 call->bchannel = bchannel;
1112 bchannel_dtmf(bchannel, 1);
1114 bchannel_blowfish(bchannel, call->bf_key, call->bf_len);
1115 if (call->pipeline[0])
1116 bchannel_pipeline(bchannel, call->pipeline);
1118 bchannel_gain(bchannel, call->rx_gain, 0);
1120 bchannel_gain(bchannel, call->tx_gain, 1);
1121 if (call->bridge_id) {
1122 CDEBUG(call, call->ast, "Join bchannel, because call is already bridged.\n");
1123 bchannel_join(bchannel, call->bridge_id);
1125 /* create only, if call exists, othewhise it bchannel is freed below... */
1126 if (bchannel_create(bchannel, ((call->nodsp)?1:0) + ((call->hdlc)?2:0)))
1127 bchannel_activate(bchannel, 1);
1130 newparam.bchannel.type = BCHANNEL_ASSIGN_ACK;
1131 newparam.bchannel.handle = param->bchannel.handle;
1132 send_message(MESSAGE_BCHANNEL, 0, &newparam);
1133 /* if call has released before bchannel is assigned */
1135 newparam.bchannel.type = BCHANNEL_RELEASE;
1136 newparam.bchannel.handle = param->bchannel.handle;
1137 send_message(MESSAGE_BCHANNEL, 0, &newparam);
1142 case BCHANNEL_REMOVE:
1143 CDEBUG(NULL, NULL, "Received BCHANNEL_REMOVE message. (handle=%08lx)\n", param->bchannel.handle);
1144 if (!(bchannel = find_bchannel_handle(param->bchannel.handle)))
1146 CERROR(NULL, NULL, "Bchannel handle %x not assigned.\n", (int)param->bchannel.handle);
1149 /* unklink from call and destroy bchannel */
1150 free_bchannel(bchannel);
1153 newparam.bchannel.type = BCHANNEL_REMOVE_ACK;
1154 newparam.bchannel.handle = param->bchannel.handle;
1155 send_message(MESSAGE_BCHANNEL, 0, &newparam);
1160 CDEBUG(NULL, NULL, "Received unknown bchannel message %d.\n", param->bchannel.type);
1165 /* handle new ref */
1166 if (message_type == MESSAGE_NEWREF)
1168 if (param->direction)
1170 /* new ref from lcr */
1171 CDEBUG(NULL, NULL, "Received new ref by LCR, due to incomming call. (ref=%ld)\n", ref);
1172 if (!ref || find_call_ref(ref))
1174 CERROR(NULL, NULL, "Illegal new ref %ld received.\n", ref);
1177 /* allocate new call instance */
1178 call = alloc_call();
1180 call->state = CHAN_LCR_STATE_IN_PREPARE;
1183 call->ref_was_assigned = 1;
1184 /* wait for setup (or release from asterisk) */
1187 /* new ref, as requested from this remote application */
1188 CDEBUG(NULL, NULL, "Received new ref by LCR, as requested from chan_lcr. (ref=%ld)\n", ref);
1189 call = find_call_ref(0);
1192 /* send release, if ref does not exist */
1193 CDEBUG(NULL, NULL, "No call found, that requests a ref.\n");
1194 send_release_and_import(call, CAUSE_NORMAL, LOCATION_PRIVATE_LOCAL);
1199 call->ref_was_assigned = 1;
1200 /* send pending setup info */
1201 if (call->state == CHAN_LCR_STATE_OUT_PREPARE)
1202 send_setup_to_lcr(call);
1203 /* release if asterisk has signed off */
1204 else if (call->state == CHAN_LCR_STATE_RELEASE)
1208 send_release_and_import(call, call->cause, call->location);
1210 send_release_and_import(call, CAUSE_NORMAL, LOCATION_PRIVATE_LOCAL);
1222 CERROR(NULL, NULL, "Received message %d without ref.\n", message_type);
1225 call = find_call_ref(ref);
1228 /* ignore ref that is not used (anymore) */
1229 CDEBUG(NULL, NULL, "Message %d from LCR ignored, because no call instance found.\n", message_type);
1233 /* handle messages */
1234 switch(message_type)
1237 lcr_in_setup(call, message_type, param);
1240 case MESSAGE_OVERLAP:
1241 lcr_in_overlap(call, message_type, param);
1244 case MESSAGE_PROCEEDING:
1245 lcr_in_proceeding(call, message_type, param);
1248 case MESSAGE_ALERTING:
1249 lcr_in_alerting(call, message_type, param);
1252 case MESSAGE_CONNECT:
1253 lcr_in_connect(call, message_type, param);
1256 case MESSAGE_DISCONNECT:
1257 lcr_in_disconnect(call, message_type, param);
1260 case MESSAGE_RELEASE:
1261 lcr_in_release(call, message_type, param);
1264 case MESSAGE_INFORMATION:
1265 lcr_in_information(call, message_type, param);
1268 case MESSAGE_NOTIFY:
1269 lcr_in_notify(call, message_type, param);
1272 case MESSAGE_FACILITY:
1273 lcr_in_facility(call, message_type, param);
1276 case MESSAGE_PATTERN: // audio available from LCR
1279 case MESSAGE_NOPATTERN: // audio not available from LCR
1282 case MESSAGE_AUDIOPATH: // if remote audio connected or hold
1283 call->audiopath = param->audiopath;
1287 CDEBUG(call, call->ast, "Message %d from LCR unhandled.\n", message_type);
1294 * release all calls (due to broken socket)
1296 static void release_all_calls(void)
1298 struct chan_call *call;
1303 /* no ast, so we may directly free call */
1305 CDEBUG(call, NULL, "Freeing call, because no Asterisk channel is linked.\n");
1309 /* already in release process */
1310 if (call->state == CHAN_LCR_STATE_RELEASE) {
1314 /* release or queue release */
1316 call->state = CHAN_LCR_STATE_RELEASE;
1317 if (!call->pbx_started) {
1318 CDEBUG(call, call->ast, "Releasing call, because no Asterisk channel is not started.\n");
1319 ast_hangup(call->ast); // call will be destroyed here
1322 CDEBUG(call, call->ast, "Queue call release, because Asterisk channel is running.\n");
1323 strcpy(call->queue_string, "H");
1327 /* release all bchannels */
1328 while(bchannel_first)
1329 free_bchannel(bchannel_first);
1334 * warning! not thread safe
1335 * returns -1 for socket error, 0 for no work, 1 for work
1337 int handle_socket(void)
1341 struct admin_list *admin;
1342 struct admin_message msg;
1344 /* read from socket */
1345 len = read(lcr_sock, &msg, sizeof(msg));
1348 CERROR(NULL, NULL, "Socket closed.\n");
1349 return(-1); // socket closed
1353 if (len != sizeof(msg))
1355 CERROR(NULL, NULL, "Socket short read. (len %d)\n", len);
1356 return(-1); // socket error
1358 if (msg.message != ADMIN_MESSAGE)
1360 CERROR(NULL, NULL, "Socket received illegal message %d.\n", msg.message);
1363 receive_message(msg.u.msg.type, msg.u.msg.ref, &msg.u.msg.param);
1367 if (errno != EWOULDBLOCK)
1369 CERROR(NULL, NULL, "Socket failed (errno %d).\n", errno);
1374 /* write to socket */
1377 admin = admin_first;
1378 len = write(lcr_sock, &admin->msg, sizeof(msg));
1381 CERROR(NULL, NULL, "Socket closed.\n");
1382 return(-1); // socket closed
1386 if (len != sizeof(msg))
1388 CERROR(NULL, NULL, "Socket short write. (len %d)\n", len);
1389 return(-1); // socket error
1392 admin_first = admin->next;
1398 if (errno != EWOULDBLOCK)
1400 CERROR(NULL, NULL, "Socket failed (errno %d).\n", errno);
1409 * open and close socket and thread
1411 int open_socket(void)
1415 struct sockaddr_un sock_address;
1416 unsigned int on = 1;
1417 union parameter param;
1420 if ((lcr_sock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
1422 CERROR(NULL, NULL, "Failed to create socket.\n");
1426 /* set socket address and name */
1427 memset(&sock_address, 0, sizeof(sock_address));
1428 sock_address.sun_family = PF_UNIX;
1429 sprintf(sock_address.sun_path, SOCKET_NAME, options.lock);
1431 /* connect socket */
1432 if ((conn = connect(lcr_sock, (struct sockaddr *)&sock_address, SUN_LEN(&sock_address))) < 0)
1436 CDEBUG(NULL, NULL, "Failed to connect to socket '%s'. Is LCR running?\n", sock_address.sun_path);
1440 /* set non-blocking io */
1441 if ((ret = ioctl(lcr_sock, FIONBIO, (unsigned char *)(&on))) < 0)
1445 CERROR(NULL, NULL, "Failed to set socket into non-blocking IO.\n");
1449 /* enque hello message */
1450 memset(¶m, 0, sizeof(param));
1451 strcpy(param.hello.application, "asterisk");
1452 send_message(MESSAGE_HELLO, 0, ¶m);
1457 void close_socket(void)
1459 struct admin_list *admin, *temp;
1461 /* flush pending messages */
1462 admin = admin_first;
1465 admin = admin->next;
1477 /* sending queue to asterisk */
1478 static int queue_send(void)
1481 struct chan_call *call;
1482 struct ast_channel *ast;
1483 struct ast_frame fr;
1488 p = call->queue_string;
1491 /* there is something to queue */
1492 if (!ast_channel_trylock(ast)) { /* succeed */
1496 CDEBUG(call, ast, "Sending queued PROCEEDING to Asterisk.\n");
1497 ast_queue_control(ast, AST_CONTROL_PROCEEDING);
1500 CDEBUG(call, ast, "Sending queued RINGING to Asterisk.\n");
1501 ast_queue_control(ast, AST_CONTROL_RINGING);
1504 CDEBUG(call, ast, "Sending queued ANSWER to Asterisk.\n");
1505 ast_queue_control(ast, AST_CONTROL_ANSWER);
1508 CDEBUG(call, ast, "Sending queued HANGUP to Asterisk.\n");
1509 ast_queue_hangup(ast);
1511 case '1': case '2': case '3': case 'a':
1512 case '4': case '5': case '6': case 'b':
1513 case '7': case '8': case '9': case 'c':
1514 case '*': case '0': case '#': case 'd':
1515 CDEBUG(call, ast, "Sending queued digit '%c' to Asterisk.\n", *p);
1516 /* send digit to asterisk */
1517 memset(&fr, 0, sizeof(fr));
1518 fr.frametype = AST_FRAME_DTMF_BEGIN;
1520 fr.delivery = ast_tv(0, 0);
1521 ast_queue_frame(ast, &fr);
1522 fr.frametype = AST_FRAME_DTMF_END;
1523 ast_queue_frame(ast, &fr);
1526 CDEBUG(call, ast, "Ignoring queued digit 0x%02d.\n", *p);
1530 call->queue_string[0] = '\0';
1531 ast_channel_unlock(ast);
1541 /* signal handler */
1542 void sighandler(int sigset)
1546 /* chan_lcr thread */
1547 static void *chan_thread(void *arg)
1551 union parameter param;
1552 time_t retry = 0, now;
1554 bchannel_pid = getpid();
1556 // signal(SIGPIPE, sighandler);
1558 memset(¶m, 0, sizeof(union parameter));
1562 ast_mutex_lock(&chan_lock);
1569 ret = handle_socket();
1571 CERROR(NULL, NULL, "Handling of socket failed - closing for some seconds.\n");
1573 release_all_calls();
1580 if (retry && now-retry > 5) {
1581 CDEBUG(NULL, NULL, "Retry to open socket.\n");
1583 if (open_socket() < 0) {
1592 ret = bchannel_handle();
1596 /* handle messages to asterisk */
1601 /* delay if no work done */
1603 ast_mutex_unlock(&chan_lock);
1605 ast_mutex_lock(&chan_lock);
1611 CERROR(NULL, NULL, "Thread exit.\n");
1613 ast_mutex_unlock(&chan_lock);
1615 // signal(SIGPIPE, SIG_DFL);
1621 * new asterisk instance
1624 struct ast_channel *lcr_request(const char *type, int format, void *data, int *cause)
1626 char exten[256], *dial, *interface, *opt;
1627 struct ast_channel *ast;
1628 struct chan_call *call;
1630 ast_mutex_lock(&chan_lock);
1631 CDEBUG(NULL, NULL, "Received request from Asterisk. (data=%s)\n", (char *)data);
1633 /* if socket is closed */
1636 CERROR(NULL, NULL, "Rejecting call from Asterisk, because LCR not running.\n");
1637 ast_mutex_unlock(&chan_lock);
1641 /* create call instance */
1642 call = alloc_call();
1645 /* failed to create instance */
1646 ast_mutex_unlock(&chan_lock);
1650 /* create asterisk channel instrance */
1651 ast = ast_channel_alloc(1, AST_STATE_RESERVED, NULL, NULL, "", NULL, "", 0, "%s/%d", lcr_type, ++glob_channel);
1654 CERROR(NULL, NULL, "Failed to create Asterisk channel.\n");
1656 /* failed to create instance */
1657 ast_mutex_unlock(&chan_lock);
1660 ast->tech = &lcr_tech;
1661 ast->tech_pvt = (void *)1L; // set pointer or asterisk will not call
1662 /* configure channel */
1663 ast->nativeformats = (options.law=='a')?AST_FORMAT_ALAW:AST_FORMAT_ULAW;
1664 ast->readformat = ast->rawreadformat = ast->nativeformats;
1665 ast->writeformat = ast->rawwriteformat = ast->nativeformats;
1667 ast->hangupcause = 0;
1671 ast->tech_pvt = call;
1672 ast->fds[0] = call->pipe[0];
1673 call->pbx_started = 0;
1675 call->state = CHAN_LCR_STATE_OUT_PREPARE;
1678 * Extract interface, dialstring, options from data.
1681 * <interface>/<dialstring>
1682 * <interface>/<dialstring>/options
1684 strncpy(exten, (char *)data, sizeof(exten)-1);
1685 exten[sizeof(exten)-1] = '\0';
1686 if ((dial = strchr(exten, '/'))) {
1689 if ((opt = strchr(dial, '/')))
1698 strncpy(call->interface, interface, sizeof(call->interface)-1);
1699 strncpy(call->dialstring, dial, sizeof(call->dialstring)-1);
1700 apply_opt(call, (char *)opt);
1702 ast_mutex_unlock(&chan_lock);
1707 * call from asterisk
1709 static int lcr_call(struct ast_channel *ast, char *dest, int timeout)
1711 union parameter newparam;
1712 struct chan_call *call;
1714 ast_mutex_lock(&chan_lock);
1715 call = ast->tech_pvt;
1717 CERROR(NULL, ast, "Received call from Asterisk, but call instance does not exist.\n");
1718 ast_mutex_unlock(&chan_lock);
1722 CDEBUG(NULL, ast, "Received call from Asterisk.\n");
1724 /* pbx process is started */
1725 call->pbx_started = 1;
1726 /* send MESSAGE_NEWREF */
1727 memset(&newparam, 0, sizeof(union parameter));
1728 newparam.direction = 0; /* request from app */
1729 send_message(MESSAGE_NEWREF, 0, &newparam);
1731 /* set hdlc if capability requires hdlc */
1732 if (ast->transfercapability == INFO_BC_DATAUNRESTRICTED
1733 || ast->transfercapability == INFO_BC_DATARESTRICTED
1734 || ast->transfercapability == INFO_BC_VIDEO)
1736 /* if hdlc is forced by option, we change transcap to data */
1738 && ast->transfercapability != INFO_BC_DATAUNRESTRICTED
1739 && ast->transfercapability != INFO_BC_DATARESTRICTED
1740 && ast->transfercapability != INFO_BC_VIDEO)
1741 ast->transfercapability = INFO_BC_DATAUNRESTRICTED;
1743 call->cid_num[0] = 0;
1744 call->cid_name[0] = 0;
1745 call->cid_rdnis[0] = 0;
1747 if (ast->cid.cid_num) if (ast->cid.cid_num[0])
1748 strncpy(call->cid_num, ast->cid.cid_num,
1749 sizeof(call->cid_num)-1);
1751 if (ast->cid.cid_name) if (ast->cid.cid_name[0])
1752 strncpy(call->cid_name, ast->cid.cid_name,
1753 sizeof(call->cid_name)-1);
1754 if (ast->cid.cid_rdnis) if (ast->cid.cid_rdnis[0])
1755 strncpy(call->cid_rdnis, ast->cid.cid_rdnis,
1756 sizeof(call->cid_rdnis)-1);
1758 ast_mutex_unlock(&chan_lock);
1762 static int lcr_digit_begin(struct ast_channel *ast, char digit)
1764 struct chan_call *call;
1765 union parameter newparam;
1768 /* only pass IA5 number space */
1769 if (digit > 126 || digit < 32)
1772 ast_mutex_lock(&chan_lock);
1773 call = ast->tech_pvt;
1775 CERROR(NULL, ast, "Received digit from Asterisk, but no call instance exists.\n");
1776 ast_mutex_unlock(&chan_lock);
1780 CDEBUG(call, ast, "Received digit '%c' from Asterisk.\n", digit);
1782 /* send information or queue them */
1783 if (call->ref && call->state == CHAN_LCR_STATE_OUT_DIALING)
1785 CDEBUG(call, ast, "Sending digit to LCR, because we are in dialing state.\n");
1786 memset(&newparam, 0, sizeof(union parameter));
1787 newparam.information.id[0] = digit;
1788 newparam.information.id[1] = '\0';
1789 send_message(MESSAGE_INFORMATION, call->ref, &newparam);
1792 && (call->state == CHAN_LCR_STATE_OUT_PREPARE || call->state == CHAN_LCR_STATE_OUT_SETUP))
1794 CDEBUG(call, ast, "Queue digits, because we are in setup/dialing state and have no ref yet.\n");
1796 strncat(call->dialque, buf, strlen(call->dialque)-1);
1799 ast_mutex_unlock(&chan_lock);
1803 static int lcr_digit_end(struct ast_channel *ast, char digit, unsigned int duration)
1805 printf("DIGIT END %c\n", digit);
1809 static int lcr_answer(struct ast_channel *ast)
1811 union parameter newparam;
1812 struct chan_call *call;
1814 ast_mutex_lock(&chan_lock);
1815 call = ast->tech_pvt;
1817 CERROR(NULL, ast, "Received answer from Asterisk, but no call instance exists.\n");
1818 ast_mutex_unlock(&chan_lock);
1822 CDEBUG(call, ast, "Received answer from Asterisk (maybe during lcr_bridge).\n");
1824 /* copy connectinfo, if bridged */
1825 if (call->bridge_call)
1826 memcpy(&call->connectinfo, &call->bridge_call->connectinfo, sizeof(struct connect_info));
1827 /* send connect message to lcr */
1828 if (call->state != CHAN_LCR_STATE_CONNECT) {
1829 memset(&newparam, 0, sizeof(union parameter));
1830 memcpy(&newparam.connectinfo, &call->connectinfo, sizeof(struct connect_info));
1831 send_message(MESSAGE_CONNECT, call->ref, &newparam);
1832 call->state = CHAN_LCR_STATE_CONNECT;
1835 /* request bchannel */
1836 if (!call->bchannel) {
1837 CDEBUG(call, ast, "Requesting B-channel.\n");
1838 memset(&newparam, 0, sizeof(union parameter));
1839 newparam.bchannel.type = BCHANNEL_REQUEST;
1840 send_message(MESSAGE_BCHANNEL, call->ref, &newparam);
1843 // memset(&newparam, 0, sizeof(union parameter));
1844 // send_message(MESSAGE_ENABLEKEYPAD, call->ref, &newparam);
1847 CDEBUG(call, ast, "DTMF is disabled by option.\n");
1851 ast_mutex_unlock(&chan_lock);
1855 static int lcr_hangup(struct ast_channel *ast)
1857 struct chan_call *call;
1858 pthread_t tid = pthread_self();
1860 if (!pthread_equal(tid, chan_tid))
1861 ast_mutex_lock(&chan_lock);
1862 call = ast->tech_pvt;
1864 CERROR(NULL, ast, "Received hangup from Asterisk, but no call instance exists.\n");
1865 if (!pthread_equal(tid, chan_tid))
1866 ast_mutex_unlock(&chan_lock);
1870 if (!pthread_equal(tid, chan_tid))
1871 CDEBUG(call, ast, "Received hangup from Asterisk thread.\n");
1873 CDEBUG(call, ast, "Received hangup from LCR thread.\n");
1875 /* disconnect asterisk, maybe not required */
1876 ast->tech_pvt = NULL;
1881 CDEBUG(call, ast, "Releasing ref and freeing call instance.\n");
1882 if (ast->hangupcause > 0)
1883 send_release_and_import(call, ast->hangupcause, LOCATION_PRIVATE_LOCAL);
1885 send_release_and_import(call, CAUSE_NORMAL, LOCATION_PRIVATE_LOCAL);
1888 if (!pthread_equal(tid, chan_tid))
1889 ast_mutex_unlock(&chan_lock);
1893 /* ref is not set, due to prepare setup or release */
1894 if (call->state == CHAN_LCR_STATE_RELEASE)
1896 /* we get the response to our release */
1897 CDEBUG(call, ast, "Freeing call instance, because we have no ref AND we are requesting no ref.\n");
1901 /* during prepare, we change to release state */
1902 CDEBUG(call, ast, "We must wait until we received our ref, until we can free call instance.\n");
1903 call->state = CHAN_LCR_STATE_RELEASE;
1906 if (!pthread_equal(tid, chan_tid))
1907 ast_mutex_unlock(&chan_lock);
1911 static int lcr_write(struct ast_channel *ast, struct ast_frame *f)
1913 struct chan_call *call;
1916 CDEBUG(NULL, ast, "No subclass\n");
1917 if (!(f->subclass & ast->nativeformats))
1918 CDEBUG(NULL, ast, "Unexpected format.\n");
1920 ast_mutex_lock(&chan_lock);
1921 call = ast->tech_pvt;
1923 ast_mutex_unlock(&chan_lock);
1926 if (call->bchannel && f->samples)
1927 bchannel_transmit(call->bchannel, f->data, f->samples);
1928 ast_mutex_unlock(&chan_lock);
1933 static struct ast_frame *lcr_read(struct ast_channel *ast)
1935 struct chan_call *call;
1938 ast_mutex_lock(&chan_lock);
1939 call = ast->tech_pvt;
1941 ast_mutex_unlock(&chan_lock);
1944 if (call->pipe[0] > -1) {
1945 if (call->rebuffer && !call->hdlc) {
1946 len = read(call->pipe[0], call->read_buff, 160);
1948 len = read(call->pipe[0], call->read_buff, sizeof(call->read_buff));
1950 if (len < 0 && errno == EAGAIN) {
1951 ast_mutex_unlock(&chan_lock);
1952 return &ast_null_frame;
1955 close(call->pipe[0]);
1957 ast_mutex_unlock(&chan_lock);
1962 call->read_fr.frametype = AST_FRAME_VOICE;
1963 call->read_fr.subclass = ast->nativeformats;
1964 call->read_fr.datalen = len;
1965 call->read_fr.samples = len;
1966 call->read_fr.delivery = ast_tv(0,0);
1967 call->read_fr.data = call->read_buff;
1968 ast_mutex_unlock(&chan_lock);
1970 return &call->read_fr;
1973 static int lcr_indicate(struct ast_channel *ast, int cond, const void *data, size_t datalen)
1975 union parameter newparam;
1977 struct chan_call *call;
1979 ast_mutex_lock(&chan_lock);
1980 call = ast->tech_pvt;
1982 CERROR(NULL, ast, "Received indicate from Asterisk, but no call instance exists.\n");
1983 ast_mutex_unlock(&chan_lock);
1988 case AST_CONTROL_BUSY:
1989 CDEBUG(call, ast, "Received indicate AST_CONTROL_BUSY from Asterisk.\n");
1990 ast_setstate(ast, AST_STATE_BUSY);
1991 if (call->state != CHAN_LCR_STATE_OUT_DISCONNECT) {
1992 /* send message to lcr */
1993 memset(&newparam, 0, sizeof(union parameter));
1994 newparam.disconnectinfo.cause = 17;
1995 newparam.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
1996 send_message(MESSAGE_DISCONNECT, call->ref, &newparam);
1998 call->state = CHAN_LCR_STATE_OUT_DISCONNECT;
2001 case AST_CONTROL_CONGESTION:
2002 CDEBUG(call, ast, "Received indicate AST_CONTROL_CONGESTION from Asterisk. (cause %d)\n", ast->hangupcause);
2003 if (call->state != CHAN_LCR_STATE_OUT_DISCONNECT) {
2004 /* send message to lcr */
2005 memset(&newparam, 0, sizeof(union parameter));
2006 newparam.disconnectinfo.cause = ast->hangupcause;
2007 newparam.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
2008 send_message(MESSAGE_DISCONNECT, call->ref, &newparam);
2010 call->state = CHAN_LCR_STATE_OUT_DISCONNECT;
2013 case AST_CONTROL_PROCEEDING:
2014 CDEBUG(call, ast, "Received indicate AST_CONTROL_PROCEEDING from Asterisk.\n");
2015 if (call->state == CHAN_LCR_STATE_IN_SETUP
2016 || call->state == CHAN_LCR_STATE_IN_DIALING) {
2017 /* send message to lcr */
2018 memset(&newparam, 0, sizeof(union parameter));
2019 send_message(MESSAGE_PROCEEDING, call->ref, &newparam);
2021 call->state = CHAN_LCR_STATE_IN_PROCEEDING;
2024 case AST_CONTROL_RINGING:
2025 CDEBUG(call, ast, "Received indicate AST_CONTROL_RINGING from Asterisk.\n");
2026 ast_setstate(ast, AST_STATE_RINGING);
2027 if (call->state == CHAN_LCR_STATE_IN_SETUP
2028 || call->state == CHAN_LCR_STATE_IN_DIALING
2029 || call->state == CHAN_LCR_STATE_IN_PROCEEDING) {
2030 /* send message to lcr */
2031 memset(&newparam, 0, sizeof(union parameter));
2032 send_message(MESSAGE_ALERTING, call->ref, &newparam);
2034 call->state = CHAN_LCR_STATE_IN_ALERTING;
2038 CDEBUG(call, ast, "Received indicate -1.\n");
2042 case AST_CONTROL_VIDUPDATE:
2043 CDEBUG(call, ast, "Received indicate AST_CONTROL_VIDUPDATE.\n");
2046 case AST_CONTROL_HOLD:
2047 CDEBUG(call, ast, "Received indicate AST_CONTROL_HOLD from Asterisk.\n");
2048 /* send message to lcr */
2049 memset(&newparam, 0, sizeof(union parameter));
2050 newparam.notifyinfo.notify = INFO_NOTIFY_REMOTE_HOLD;
2051 send_message(MESSAGE_NOTIFY, call->ref, &newparam);
2053 /*start music onhold*/
2054 ast_moh_start(ast,data,ast->musicclass);
2057 case AST_CONTROL_UNHOLD:
2058 CDEBUG(call, ast, "Received indicate AST_CONTROL_UNHOLD from Asterisk.\n");
2059 /* send message to lcr */
2060 memset(&newparam, 0, sizeof(union parameter));
2061 newparam.notifyinfo.notify = INFO_NOTIFY_REMOTE_RETRIEVAL;
2062 send_message(MESSAGE_NOTIFY, call->ref, &newparam);
2068 #ifdef AST_CONTROL_SRCUPDATE
2069 case AST_CONTROL_SRCUPDATE:
2070 CDEBUG(call, ast, "Received indicate AST_CONTROL_SRCUPDATE from Asterisk.\n");
2075 CERROR(call, ast, "Received indicate from Asterisk with unknown condition %d.\n", cond);
2081 ast_mutex_unlock(&chan_lock);
2088 static int lcr_fixup(struct ast_channel *oldast, struct ast_channel *ast)
2090 struct chan_call *call;
2096 ast_mutex_lock(&chan_lock);
2097 call = ast->tech_pvt;
2099 CERROR(NULL, ast, "Received fixup from Asterisk, but no call instance exists.\n");
2100 ast_mutex_unlock(&chan_lock);
2104 CDEBUG(call, ast, "Received fixup from Asterisk.\n");
2106 ast_mutex_unlock(&chan_lock);
2111 * send_text asterisk
2113 static int lcr_send_text(struct ast_channel *ast, const char *text)
2115 struct chan_call *call;
2116 union parameter newparam;
2118 ast_mutex_lock(&chan_lock);
2119 call = ast->tech_pvt;
2121 CERROR(NULL, ast, "Received send_text from Asterisk, but no call instance exists.\n");
2122 ast_mutex_unlock(&chan_lock);
2126 CDEBUG(call, ast, "Received send_text from Asterisk. (text=%s)\n", text);
2127 memset(&newparam, 0, sizeof(union parameter));
2128 strncpy(newparam.notifyinfo.display, text, sizeof(newparam.notifyinfo.display)-1);
2129 send_message(MESSAGE_NOTIFY, call->ref, &newparam);
2130 ast_mutex_lock(&chan_lock);
2137 enum ast_bridge_result lcr_bridge(struct ast_channel *ast1,
2138 struct ast_channel *ast2, int flags,
2139 struct ast_frame **fo,
2140 struct ast_channel **rc, int timeoutms)
2143 struct chan_call *call1, *call2;
2144 struct ast_channel *carr[2], *who;
2146 struct ast_frame *f;
2149 CDEBUG(NULL, NULL, "Received briding request from Asterisk.\n");
2154 /* join via dsp (if the channels are currently open) */
2155 ast_mutex_lock(&chan_lock);
2156 call1 = ast1->tech_pvt;
2157 call2 = ast2->tech_pvt;
2158 if (!call1 || !call2) {
2159 CDEBUG(NULL, NULL, "Bridge, but we don't have two call instances, exitting.\n");
2160 ast_mutex_unlock(&chan_lock);
2161 return AST_BRIDGE_COMPLETE;
2164 /* join, if both call instances uses dsp */
2165 if (!call1->nodsp && !call2->nodsp) {
2166 CDEBUG(NULL, NULL, "Both calls use DSP, briding via DSP.\n");
2168 /* get bridge id and join */
2169 bridge_id = new_bridge_id();
2171 call1->bridge_id = bridge_id;
2172 if (call1->bchannel)
2173 bchannel_join(call1->bchannel, bridge_id);
2175 call2->bridge_id = bridge_id;
2176 if (call2->bchannel)
2177 bchannel_join(call2->bchannel, bridge_id);
2179 if (call1->nodsp && call2->nodsp)
2180 CDEBUG(NULL, NULL, "Both calls use no DSP, briding in channel driver.\n");
2182 CDEBUG(NULL, NULL, "One call uses no DSP, briding in channel driver.\n");
2183 call1->bridge_call = call2;
2184 call2->bridge_call = call1;
2186 if (call1->state == CHAN_LCR_STATE_IN_SETUP
2187 || call1->state == CHAN_LCR_STATE_IN_DIALING
2188 || call1->state == CHAN_LCR_STATE_IN_PROCEEDING
2189 || call1->state == CHAN_LCR_STATE_IN_ALERTING) {
2190 CDEBUG(call1, ast1, "Bridge established before lcr_answer, so we call it ourself: Calling lcr_answer...\n");
2193 if (call2->state == CHAN_LCR_STATE_IN_SETUP
2194 || call2->state == CHAN_LCR_STATE_IN_DIALING
2195 || call2->state == CHAN_LCR_STATE_IN_PROCEEDING
2196 || call2->state == CHAN_LCR_STATE_IN_ALERTING) {
2197 CDEBUG(call2, ast2, "Bridge established before lcr_answer, so we call it ourself: Calling lcr_answer...\n");
2201 /* sometimes SIP phones forget to send RETRIEVE before TRANSFER
2202 so let's do it for them. Hmpf.
2205 if (call1->on_hold) {
2206 union parameter newparam;
2208 memset(&newparam, 0, sizeof(union parameter));
2209 newparam.notifyinfo.notify = INFO_NOTIFY_REMOTE_RETRIEVAL;
2210 send_message(MESSAGE_NOTIFY, call1->ref, &newparam);
2215 if (call2->on_hold) {
2216 union parameter newparam;
2218 memset(&newparam, 0, sizeof(union parameter));
2219 newparam.notifyinfo.notify = INFO_NOTIFY_REMOTE_RETRIEVAL;
2220 send_message(MESSAGE_NOTIFY, call2->ref, &newparam);
2225 ast_mutex_unlock(&chan_lock);
2229 who = ast_waitfor_n(carr, 2, &to);
2232 CDEBUG(NULL, NULL, "Empty read on bridge, breaking out.\n");
2237 if (!f || f->frametype == AST_FRAME_CONTROL) {
2239 CDEBUG(NULL, NULL, "Got hangup.\n");
2241 CDEBUG(NULL, NULL, "Got CONTROL.\n");
2248 if ( f->frametype == AST_FRAME_DTMF ) {
2249 CDEBUG(NULL, NULL, "Got DTMF.\n");
2265 CDEBUG(NULL, NULL, "Releasing bride.\n");
2267 /* split channels */
2268 ast_mutex_lock(&chan_lock);
2269 call1 = ast1->tech_pvt;
2270 call2 = ast2->tech_pvt;
2271 if (call1 && call1->bridge_id)
2273 call1->bridge_id = 0;
2274 if (call1->bchannel)
2275 bchannel_join(call1->bchannel, 0);
2276 if (call1->bridge_call)
2277 call1->bridge_call->bridge_call = NULL;
2279 if (call2 && call1->bridge_id)
2281 call2->bridge_id = 0;
2282 if (call2->bchannel)
2283 bchannel_join(call2->bchannel, 0);
2284 if (call2->bridge_call)
2285 call2->bridge_call->bridge_call = NULL;
2287 call1->bridge_call = NULL;
2288 call2->bridge_call = NULL;
2290 ast_mutex_unlock(&chan_lock);
2291 return AST_BRIDGE_COMPLETE;
2293 static struct ast_channel_tech lcr_tech = {
2295 .description="Channel driver for connecting to Linux-Call-Router",
2296 .requester=lcr_request,
2297 .send_digit_begin=lcr_digit_begin,
2298 .send_digit_end=lcr_digit_end,
2305 .indicate=lcr_indicate,
2307 .send_text=lcr_send_text,
2316 static int lcr_show_lcr (int fd, int argc, char *argv[])
2321 static int lcr_show_calls (int fd, int argc, char *argv[])
2326 static int lcr_reload_routing (int fd, int argc, char *argv[])
2331 static int lcr_reload_interfaces (int fd, int argc, char *argv[])
2336 static int lcr_port_block (int fd, int argc, char *argv[])
2341 static int lcr_port_unblock (int fd, int argc, char *argv[])
2346 static int lcr_port_unload (int fd, int argc, char *argv[])
2351 static struct ast_cli_entry cli_show_lcr =
2352 { {"lcr", "show", "lcr", NULL},
2354 "Shows current states of LCR core",
2355 "Usage: lcr show lcr\n",
2358 static struct ast_cli_entry cli_show_calls =
2359 { {"lcr", "show", "calls", NULL},
2361 "Shows current calls made by LCR and Asterisk",
2362 "Usage: lcr show calls\n",
2365 static struct ast_cli_entry cli_reload_routing =
2366 { {"lcr", "reload", "routing", NULL},
2368 "Reloads routing conf of LCR, current uncomplete calls will be disconnected",
2369 "Usage: lcr reload routing\n",
2372 static struct ast_cli_entry cli_reload_interfaces =
2373 { {"lcr", "reload", "interfaces", NULL},
2374 lcr_reload_interfaces,
2375 "Reloads interfaces conf of LCR",
2376 "Usage: lcr reload interfaces\n",
2379 static struct ast_cli_entry cli_port_block =
2380 { {"lcr", "port", "block", NULL},
2382 "Blocks LCR port for further calls",
2383 "Usage: lcr port block \"<port>\"\n",
2386 static struct ast_cli_entry cli_port_unblock =
2387 { {"lcr", "port", "unblock", NULL},
2389 "Unblocks or loads LCR port, port is opened my mISDN",
2390 "Usage: lcr port unblock \"<port>\"\n",
2393 static struct ast_cli_entry cli_port_unload =
2394 { {"lcr", "port", "unload", NULL},
2396 "Unloads LCR port, port is closes by mISDN",
2397 "Usage: lcr port unload \"<port>\"\n",
2403 static int lcr_config_exec(struct ast_channel *ast, void *data)
2405 struct chan_call *call;
2407 ast_mutex_lock(&chan_lock);
2408 CDEBUG(NULL, ast, "Received lcr_config (data=%s)\n", (char *)data);
2412 if (call->ast == ast)
2417 apply_opt(call, (char *)data);
2419 CERROR(NULL, ast, "lcr_config app not called by chan_lcr channel.\n");
2421 ast_mutex_unlock(&chan_lock);
2426 * module loading and destruction
2428 int load_module(void)
2432 for (i = 0; i < 256; i++) {
2433 flip_bits[i] = (i>>7) | ((i>>5)&2) | ((i>>3)&4) | ((i>>1)&8)
2434 | (i<<7) | ((i&2)<<5) | ((i&4)<<3) | ((i&8)<<1);
2437 if (read_options() == 0) {
2438 CERROR(NULL, NULL, "%s", options_error);
2439 return AST_MODULE_LOAD_DECLINE;
2442 ast_mutex_init(&chan_lock);
2443 ast_mutex_init(&log_lock);
2445 if (open_socket() < 0) {
2446 /* continue with closed socket */
2449 if (bchannel_initialize()) {
2450 CERROR(NULL, NULL, "Unable to open mISDN device\n");
2452 return AST_MODULE_LOAD_DECLINE;
2456 lcr_tech.capabilities = (options.law=='a')?AST_FORMAT_ALAW:AST_FORMAT_ULAW;
2457 if (ast_channel_register(&lcr_tech)) {
2458 CERROR(NULL, NULL, "Unable to register channel class\n");
2459 bchannel_deinitialize();
2461 return AST_MODULE_LOAD_DECLINE;
2464 ast_register_application("lcr_config", lcr_config_exec, "lcr_config",
2465 "lcr_config(<opt><optarg>:<opt>:...)\n"
2466 "Sets LCR opts. and optargs\n"
2468 "The available options are:\n"
2469 " d - Send display text on called phone, text is the optarg.\n"
2470 " n - Don't detect dtmf tones on called channel.\n"
2471 " h - Force data call (HDLC).\n"
2472 " t - Disable mISDN_dsp features (required for fax application).\n"
2473 " c - Make crypted outgoing call, optarg is keyindex.\n"
2474 " e - Perform echo cancelation on this channel.\n"
2475 " Takes mISDN pipeline option as optarg.\n"
2476 // " s - Send Non Inband DTMF as inband.\n"
2477 " vr - rxgain control\n"
2478 " vt - txgain control\n"
2479 " Volume changes at factor 2 ^ optarg.\n"
2484 ast_cli_register(&cli_show_lcr);
2485 ast_cli_register(&cli_show_calls);
2486 ast_cli_register(&cli_reload_routing);
2487 ast_cli_register(&cli_reload_interfaces);
2488 ast_cli_register(&cli_port_block);
2489 ast_cli_register(&cli_port_unblock);
2490 ast_cli_register(&cli_port_unload);
2494 if ((pthread_create(&chan_tid, NULL, chan_thread, NULL)<0))
2496 /* failed to create thread */
2497 bchannel_deinitialize();
2499 ast_channel_unregister(&lcr_tech);
2500 return AST_MODULE_LOAD_DECLINE;
2505 int unload_module(void)
2507 /* First, take us out of the channel loop */
2508 CDEBUG(NULL, NULL, "-- Unregistering mISDN Channel Driver --\n");
2511 pthread_join(chan_tid, NULL);
2513 ast_channel_unregister(&lcr_tech);
2515 ast_unregister_application("lcr_config");
2518 if (mISDN_created) {
2519 bchannel_deinitialize();
2523 if (lcr_sock >= 0) {
2531 int reload_module(void)
2538 #define AST_MODULE "chan_lcr"
2540 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Channel driver for Linux-Call-Router Support (ISDN BRI/PRI)",
2541 .load = load_module,
2542 .unload = unload_module,
2543 .reload = reload_module,